void Start()
{
var diner = new DinerMenu();
var lunch = new LunchMenu();
_PrintMenus(diner);
_PrintMenus(lunch);
}
static void Main(string[] args)
{
/* on C# is not needed an iterator implementation for collection. They already implements
* this pattern. Program writen is only for learning purposes*/
PancakeHouseMenu pancakeHouseMenu = new PancakeHouseMenu();
DinerMenu dinerMenu = new DinerMenu();
Waitress waitress = new Waitress(pancakeHouseMenu, dinerMenu);
waitress.PrintMenu();
}
static void Main(string[] args)
{
PancakeHouseMenu pancakeHouseMenu = new PancakeHouseMenu();
DinerMenu dinerMenu = new DinerMenu();
Waitress waitress = new Waitress(pancakeHouseMenu, dinerMenu);
waitress.PrintMenu();
PrintMenu();
Console.ReadLine();
}
public static void PrintMenu()
{
PancakeHouseMenu pancakeHouseMenu = new PancakeHouseMenu();
DinerMenu dinerMenu = new DinerMenu();
List <MenuItem> breakfastItems = pancakeHouseMenu.GetMenuItems();
MenuItem[] lunchItems = dinerMenu.GetMenuItems();
Console.WriteLine("USING FOR EACH");
foreach (MenuItem menuItem in breakfastItems)
{
Console.WriteLine(menuItem.GetName());
Console.WriteLine("\n" + menuItem.GetPrice());
Console.WriteLine("\n" + menuItem.GetDescription());
}
foreach (MenuItem menuItem in lunchItems)
{
Console.WriteLine(menuItem.GetName());
Console.WriteLine("\n" + menuItem.GetPrice());
Console.WriteLine("\n" + menuItem.GetDescription());
}
Console.WriteLine("USING FOR LOOPS");
for (int i = 0; i < breakfastItems.Count; i++)
{
MenuItem menuItem = (MenuItem)breakfastItems[i];
Console.WriteLine(menuItem.GetName());
Console.WriteLine("\n" + menuItem.GetPrice());
Console.WriteLine("\n" + menuItem.GetDescription());
}
for (int i = 0; i < lunchItems.Length; i++)
{
MenuItem menuItem = lunchItems[i];
Console.WriteLine(menuItem.GetName());
Console.WriteLine("\n" + menuItem.GetPrice());
Console.WriteLine("\n" + menuItem.GetDescription());
}
}
/*
* The Iterator Pattern
*
* Provides a way to access the elements of an aggregate object
* sequentially without exposing its underlying representation.
*
* Example:
* Print out menu of the cafe and print out the categories of the meal.
*
* 1. Ask the object for its iterator.
* 2. Use iterator to iterate through the items in the aggregate.
* 3. Iteration code works with any kind of agregate objects.
*
* A class should have only one reason to change. (Design Principle #6)
*
*
*/
static void Main(string[] args)
{
var pancakeHouseMenue = new PancakeHouseMenu();
var dinerMenu = new DinerMenu();
IEnumerable vegMenu = new VegeterianMenu();
IIterator pancakeHouseIter = pancakeHouseMenue.CreateIterator();
IIterator dinerMenuIter = dinerMenu.CreateIterator();
//IEnumerator vegMenuEnu = vegMenu.GetEnumerator();
Console.WriteLine("MENU (with iterators)\n----\nBREAKFAST");
PrintMenu(pancakeHouseIter);
Console.WriteLine("LUNCH");
PrintMenu(dinerMenuIter);
Console.WriteLine("VEGETERIAN");
foreach (var i in vegMenu)
{
Console.WriteLine(i as string);
}
}
